Compilation is not supported for following modules: KonkurEnglishVocabulary001. Unfortunately you can't have non-Gradle Java modules and Android-Gradle modules in one project code example
Example 1: capacitor-android. Unfortunately you can't have non-Gradle Java modules and Android-Gradle modules in one project
1- close the project
2- close Android Studio IDE
3- delete the .idea directory
4- delete all .iml files
5- open Android Studio IDE and import the project
Answer from here
Example 2: Compilation is not supported for following modules: android. Unfortunately you can't have non-Gradle Java modules and Android-Gradle modules in one project
save .idea folder somewhere else (for backup)
remove .idea folder
start AndroidStudio
select project
[there may be an error, ignore that]
click File -> Invalidate Caches/ Restart
click button: Invalidate Caches/ Restart
resolved